diff --git a/README.html b/README.html
index 6dc39b7..d431916 100755
--- a/README.html
+++ b/README.html
@@ -1997,6 +1997,8 @@ Reference code like <span class="org-org-code">variables</span> or <span class="
 
 (<span class="org-keyword">defun</span> <span class="org-function-name">hello</span> (name <span class="org-type">&amp;optional</span> greeting)
   (message <span class="org-string">"%s %s"</span> (or greeting <span class="org-string">"Hello"</span>) name))
+
+(setq tab-width 4)
 </pre></div>
 </div>
 </div>
diff --git a/README.org b/README.org
index f05fac6..138f212 100755
--- a/README.org
+++ b/README.org
@@ -1081,6 +1081,8 @@ int main(int arc, char **argv)
 
 (defun hello (name &optional greeting)
   (message "%s %s" (or greeting "Hello") name))
+
+(setq tab-width 4)
 #+end_src
 
 # See http://sphinxcontrib-emacs.readthedocs.org/en/latest/guide/domain.html